I can't sign in to DFA Tools

You may be attempting to sign in to DFA Tools with your Google Account sign-in information. You need to use your legacy DoubleClick for Advertisers (DFA) sign-in to access DFA Tools  even after you update your DFA sign-in to a Google Account. In other words, you'll use your Google Account to sign in to DFA, and your legacy DFA sign-in to access DFA Tools.